HNB appliance and three-section heating body heating circuit thereof

Abstract

The utility model is suitable for the technical field of HNB appliances, and provides an HNB appliance and a three-section heating body heating circuit thereof, and the three-section heating body comprises a first heating body, a second heating body and a third heating body. The three-section heating body heating circuit comprises a first power control module, a first heating control module, a second power control module, a second heating control module and a control module; the control module is used for controlling the modules at the two ends of the at least one heating body to be conducted so as to heat the at least one heating body; according to the technical scheme, by designing the three-section heating element heating circuit, the limitation of a single heating element in traditional HNB equipment is broken through, a plurality of heating areas can be provided for a user, and more flexible heating control is achieved.

Description

Technical Field

[0001] This application relates to the field of HNB (Heated Toilet) appliance technology, and in particular to an HNB appliance and its three-stage heating element heating circuit. Background Technology

[0002] HNB (Heat No Burn) technology is gradually becoming an emerging technological trend in e-cigarettes and HNB devices. These products aim to reduce the harmful substances produced during the combustion of traditional tobacco by heating rather than burning, thereby reducing the health risks to users. Traditional heat-not-burn devices generally use a single heating element, resulting in a relatively simple heating method that cannot provide multiple heating zones, thus limiting users' needs for heating effects. Utility Model Content

[0003] This utility model provides an HNB appliance and its three-segment heating circuit to solve the problem that the existing technology uses a single heating element for heating, which results in a relatively simple heating method and cannot provide multiple heating areas, thus limiting the user's demand for heating effect.

[0004] The first aspect of this utility model provides a three-segment heating circuit for an HNB (Heated Tobacco Handling) device. The three heating segments include a first heating element, a second heating element, and a third heating element. A first end of the first heating element is connected to a second end of the second heating element, and a first end of the second heating element is connected to a second end of the third heating element. The three-segment heating circuit includes: a first power control module, a first heating control module, a second power control module, a second heating control module, and a control module. A first end of the first power control module is connected to a second end of the first heating element, a first end of the first heating control module is connected to a first end of the first heating element, a first end of the second power control module is connected to a first end of the second heating element, and a first end of the second heating control module is connected to a first end of the third heating element. When one module of the power control module and the heating control module connected to each end of each heating element is connected to a power supply voltage, the other module is grounded.

[0005] The control module is connected to the control terminal of the first power control module, the control terminal of the first heating control module, the control terminal of the second power control module, the control terminal of the second heating control module, the first end of the first heating element, and the first end of the third heating element, respectively, and is used to control the power control module and the heating control module at both ends of at least one heating element to be turned on, so as to heat at least one heating element.

[0006] Furthermore, the second terminal of the first power control module is grounded, the second terminal of the first heating control module is connected to the power supply voltage, the second terminal of the second power control module is grounded, and the second terminal of the second heating control module is connected to the power supply voltage.

[0007] Furthermore, the second terminal of the first power control module is connected to the power supply voltage, the second terminal of the first heating control module is grounded, the second terminal of the second power control module is connected to the power supply voltage, and the second terminal of the second heating control module is grounded.

[0008] Furthermore, the first power control module includes a first NMOS transistor and a first resistor. The drain of the first NMOS transistor is the first terminal of the first power control module. The first terminal of the first resistor and the source of the first NMOS transistor are connected together to form the second terminal of the first power control module. The second terminal of the first resistor and the gate of the first NMOS transistor are connected together to form the control terminal of the first power control module.

[0009] Furthermore, the second power control module includes a second NMOS transistor and a second resistor. The drain of the second NMOS transistor is the first terminal of the second power control module. The first terminal of the second resistor and the source of the second NMOS transistor are connected together to form the second terminal of the second power control module. The second terminal of the second resistor and the gate of the second NMOS transistor are connected together to form the control terminal of the second power control module.

[0010] Furthermore, the first heating control module includes a second PMOS transistor and a fifth resistor. The drain of the second PMOS transistor is the first terminal of the first heating control module. The source of the second PMOS transistor and the first terminal of the fifth resistor are connected together to form the second terminal of the first heating control module. The gate of the second PMOS transistor and the second terminal of the fifth resistor are connected together to form the control terminal of the first heating control module.

[0011] Furthermore, the second heating control module includes a fourth PMOS transistor and an eighth resistor. The drain of the fourth PMOS transistor is the first terminal of the second heating control module. The source of the fourth PMOS transistor and the first terminal of the eighth resistor are connected together to form the second terminal of the second heating control module. The gate of the fourth PMOS transistor and the second terminal of the eighth resistor are connected together to form the control terminal of the second heating control module.

[0012] Furthermore, the three-segment heating element heating circuit also includes a first temperature measurement and control module and a second temperature measurement and control module. The first end of the first temperature measurement and control module is connected to the first end of the first heating control module, the second end of the first temperature measurement and control module is connected to the second end of the first heating control module, the control end of the first temperature measurement and control module is connected to the control module, the first end of the second temperature measurement and control module is connected to the first end of the second heating control module, the second end of the second temperature measurement and control module is connected to the second end of the second heating control module, and the control end of the second temperature measurement and control module is connected to the control module.

[0013] The control module is also used to control the conduction of the temperature measurement control module and the power control module connected to each heating element, so as to measure the temperature of each heating element.

[0014] Furthermore, the first temperature measurement and control module includes a first PMOS transistor, a third resistor, and a fourth resistor. The first end of the fourth resistor is the first terminal of the first temperature measurement and control module, the second end of the fourth resistor is connected to the drain of the first PMOS transistor, the source of the first PMOS transistor and the first end of the third resistor are jointly connected to the second terminal of the first temperature measurement and control module, and the gate of the first PMOS transistor and the second end of the third resistor are jointly connected to the control terminal of the first temperature measurement and control module.

[0015] Furthermore, the second temperature measurement and control module includes a third PMOS transistor, a sixth resistor, and a seventh resistor. The first end of the seventh resistor is the first end of the second temperature measurement and control module, the second end of the seventh resistor is connected to the drain of the third PMOS transistor, the source of the third PMOS transistor and the first end of the sixth resistor are connected together to form the second end of the first temperature measurement and control module, and the gate of the third PMOS transistor and the second end of the sixth resistor are connected together to form the control end of the second temperature measurement and control module.

[0016] A second aspect of this utility model provides an HNB appliance, including the three-segment heating circuit described in the first aspect.

[0017] The technical effects of this utility model embodiment are as follows: This technical solution, by designing a three-segment heating circuit, breaks through the limitation of a single heating element in traditional HNB devices, and can provide users with multiple heating areas, achieving more flexible heating control. By precisely controlling the heating module of each heating element, the heating effect of different heating elements can be adjusted as needed, optimizing the temperature distribution, thereby improving heating efficiency and better meeting user needs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the first structure of a three-section heating element heating circuit of an HNB appliance in Embodiment 1 of this utility model;

[0020] Figure 2 This is a schematic diagram of the second structure of the three-segment heating circuit of an HNB appliance in Embodiment 1 of this utility model;

[0021] Figure 3 This is a schematic diagram of the third structure of a three-section heating element heating circuit for an HNB device in Embodiment 1 of this utility model;

[0022] Figure 4 This is a schematic diagram of the fourth structure of the three-segment heating circuit of an HNB appliance in Embodiment 1 of this utility model;

[0023] Figure 5 This is a circuit diagram of the first type of heating circuit for a three-segment heating element in an HNB appliance according to Embodiment 1 of this utility model.

[0024] Figure 6 This is a circuit diagram of the second type of heating circuit for a three-segment heating element in an HNB appliance according to Embodiment 1 of this utility model;

[0025] Figure 7 This is a current flow diagram of the A-segment heating mode in the first circuit of the three-segment heating circuit of an HNB appliance in Embodiment 1 of this utility model;

[0026] Figure 8 This is a current flow diagram of the A-segment temperature measurement mode in the first circuit of the three-segment heating circuit of an HNB appliance in Embodiment 1 of this utility model.

[0027] Figure 9 This is a current flow diagram of the B-segment temperature measurement mode in the first circuit of the three-segment heating circuit of an HNB appliance in Embodiment 1 of this utility model.

[0028] Figure 10 This is a current flow diagram of the B-segment temperature measurement mode in the first circuit of the three-segment heating circuit of an HNB appliance in Embodiment 1 of this utility model.

[0029] Figure 11This is a current flow diagram of the C-segment temperature measurement mode in the first circuit of the three-segment heating circuit of an HNB appliance in Embodiment 1 of this utility model.

[0030] Figure 12 This is a current flow diagram of the C-segment temperature measurement mode in the first circuit of the three-segment heating circuit of an HNB appliance in Embodiment 1 of this utility model.

[0031] Figure 13 This is a current flow diagram of the A-segment heating mode in the second circuit of the three-segment heating circuit of an HNB appliance in Embodiment 1 of this utility model;

[0032] Figure 14 This is a current flow diagram of the A-segment temperature measurement mode in the second circuit of the three-segment heating circuit of an HNB appliance in Embodiment 1 of this utility model;

[0033] Figure 15 This is a current flow diagram of the B-segment temperature measurement mode in the second circuit of the three-segment heating circuit of an HNB appliance in Embodiment 1 of this utility model.

[0034] Figure 16 This is a current flow diagram of the B-segment temperature measurement mode in the second circuit of the three-segment heating circuit of an HNB appliance in Embodiment 1 of this utility model.

[0035] Figure 17 This is a current flow diagram of the C-segment temperature measurement mode in the second circuit of the three-segment heating circuit of an HNB appliance in Embodiment 1 of this utility model;

[0036] Figure 18 This is a current flow diagram of the C-segment temperature measurement mode in the second circuit of the three-segment heating circuit of an HNB appliance in Embodiment 1 of this utility model;

[0037] In the figure: 101, first heating element; 102, second heating element; 103, third heating element; 104, first power control module; 105, first heating control module; 106, second power control module; 107, second heating control module; 108, control module; 109, first temperature measurement control module; 110, second temperature measurement control module. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0039] It should be understood that, when used in this specification and appended claims, unless otherwise stated, the term " / " means "or," for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist, for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, in the description of the embodiments in this application, "multiple" refers to two or more.

[0040] In the description of this utility model specification and the appended claims, the term "comprising" indicates the presence of a described feature, integral, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. It should also be understood that the term "and / or" as used in this utility model specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0041] Furthermore, in the description of this utility model specification and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of the present invention include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0043] It should be understood that the sequence number of each step in the following embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of this utility model embodiment.

[0044] To facilitate a further understanding of the technical solutions in some embodiments of this application, the technical solutions of the HNB appliance and its three-segment heating element heating circuit, and how these solutions solve the aforementioned technical problems, are described in detail below with reference to specific embodiments and accompanying drawings. The embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application.

[0045] In some embodiments, such as Figure 1 and Figure 2 As shown, a three-stage heating circuit for an HNB (Heated Tobacco Handling) appliance is provided. The three heating stages include a first heating element 101, a second heating element 102, and a third heating element 103. The first end of the first heating element 101 is connected to the second end of the second heating element 102, and the first end of the second heating element 102 is connected to the second end of the third heating element 103. The three-stage heating circuit includes: a first power control module 104, a first heating control module 105, a second power control module 106, a second heating control module 107, and a control module 108. The first end of the first power control module 106 is connected to the second end of the first heating element 101, the first end of the first heating control module 105 is connected to the first end of the first heating element 101, and the second power control module 107 is connected to the first heating element 108. The first end of module 106 is connected to the first end of the second heating element 102, and the first end of the second heating control module 107 is connected to the first end of the third heating element 103. When one of the power control module and heating control module connected to both ends of each heating element is connected to the power supply voltage, the other module is grounded. The control module 108 is connected to the control end of the first power control module 104, the control end of the first heating control module 105, the control end of the second power control module 106, the control end of the second heating control module 107, the first end of the first heating element 101, and the first end of the third heating element 103, respectively, and is used to control that the power control module and heating control module at both ends of at least one heating element are turned on, so as to heat at least one heating element.

[0046] The first power control module 104 controls the heating power supply of the first heating element 101, adjusting the current flowing through it for heating. When the control module 108 sends a control signal, the first power control module 104 adjusts the current flowing through the first heating element 101 by regulating its switching state (such as a MOSFET or other type of switching element), thereby controlling the temperature of the first heating element 101. The first heating control module 105 controls the heating of the first heating element 101 and the second heating element 102. The second power control module 106 controls the heating power supply of the second heating element 102 or the third heating element 103, adjusting the current flowing through it for heating. Similar to the first power control module 104, the second power control module 106 heats the second heating element 102 and the third heating element 103 by controlling the intensity of the current. Its operation is the same as the first power control module 104, except that it controls the second heating element 102 and the third heating element 103. The second heating control module 107 is used to control the heating of the third heating element 103. The control module 108 coordinates the operation of each module and adjusts the states of the power control module and the heating control module to achieve heating and temperature control. One of the two modules connected to each heating element has its second terminal grounded, and the second terminal of the other module is connected to the power supply voltage. This configuration allows each heating element to select a heating power source or perform temperature detection as needed, ensuring that the system can monitor and adjust the temperature in real time during the heating process. The second terminal of one of the two modules connected to each heating element is grounded, and the second terminal of the other module is connected to the power supply voltage, including two cases: the first case is as follows... Figure 1 As shown, the second terminal of the first power control module 104 and the second terminal of the second power control module 106 are both connected to the power supply voltage, and the second terminal of the first heating control module 105 and the second terminal of the second heating control module 107 are both grounded. The second case is as follows... Figure 2 As shown, the second terminal of the first power control module 104 and the second terminal of the second power control module 106 are both grounded, and the second terminal of the first heating control module 105 and the second terminal of the second heating control module 107 are both connected to the power supply voltage.

[0047] like Figure 1As shown, its working process is as follows: When the first heating element 101 is in heating mode, the control module 108 controls the first power control module 104 and the first heating control module 105 to be turned on, and the first power control module 104, the first heating element 101, and the first heating control module 105 form a circuit, and the first heating element 101 heats up; when the second heating element 102 is in heating mode, the control module 108 controls the second power control module 106 and the first heating control module 105 to be turned on, and the second power control module 106, the second heating element 102, and the first heating control module 105 form a circuit, and the second heating element 102 heats up; when the third heating element 103 is in heating mode, the control module 108 controls the second power control module 106 and the second heating control module 107 to be turned on, and the second power control module 106, the second heating element 102, and the second heating control module 107 form a circuit, and the third heating element 103 heats up.

[0048] like Figure 2 As shown, its working process is as follows: When the first heating element 101 is in heating mode, the control module 108 controls the first power control module 104 and the first heating control module 105 to be turned on, and the first heating control module 105, the first heating element 101, and the first power control module 104 form a circuit, and the first heating element 101 heats up; when the second heating element 102 is in heating mode, the control module 108 controls the second power control module 106 and the first heating control module 105 to be turned on, and the first heating control module 105, the second heating element 102, and the second power control module 106 form a circuit, and the second heating element 102 heats up; when the third heating element 103 is in heating mode, the control module 108 controls the second power control module 106 and the second heating control module 107 to be turned on, and the second heating control module 107, the second heating element 102, and the second power control module 106 form a circuit, and the third heating element 103 heats up.

[0049] The technical advantages of this embodiment are as follows: This technical solution, by designing a three-segment heating circuit, breaks through the limitation of a single heating element in traditional HNB devices, providing users with multiple heating zones and enabling more flexible heating control. By precisely controlling the heating module of each heating element, the heating effect of different heating elements can be adjusted as needed, optimizing temperature distribution, thereby improving heating efficiency and better meeting user needs. Furthermore, by configuring the ports of two modules to be grounded or connected to a power supply voltage, the heating power supply can be flexibly selected, further optimizing the heating process of the heating elements.

[0050] In one embodiment, the three-segment heating circuit further includes a first temperature measurement and control module 109 and a second temperature measurement and control module 110. The first end of the first temperature measurement and control module 109 is connected to the first end of the first heating control module 105, the second end of the first temperature measurement and control module 109 is connected to the second end of the first heating control module 105, and the control end of the first temperature measurement and control module 109 is connected to the control module 108. The first end of the second temperature measurement and control module 110 is connected to the first end of the second heating control module 107, the second end of the second temperature measurement and control module 110 is connected to the second end of the second heating control module 107, and the control end of the second temperature measurement and control module 110 is connected to the control module 108. The control module 108 is also used to control the conduction of the temperature measurement and control module and the power control module connected to each heating element, so as to measure the temperature of each heating element.

[0051] The first temperature control module 109 is connected to the first heating control module 105 and measures the temperature of the first heating element 101. Using a voltage divider principle, it converts the resistance change of the first heating element 101 into a voltage signal, which is then fed back to the control module 108 via the control terminal of the first temperature control module 109 for processing. The control module 108 can accurately measure the temperature of the first heating element 101. The second temperature control module 110 is connected to the second heating control module 107 and measures the temperature of the second heating element 102 or the third heating element 103. Its working principle is similar to that of the first temperature control module 109; it is connected to the second heating element 102 via a voltage divider circuit. When the temperature of the second heating element 102 changes, its resistance changes, thus affecting the voltage value. This signal is returned to the control module via the control terminal of the second temperature control module 110, ensuring that the temperature of the second heating element 102 is monitored in real time.

[0052] like Figure 3As shown, when the first heating element 101 is in temperature measurement mode, the control module 108 controls the first power control module 104 and the first temperature measurement control module 109 to conduct, forming a circuit. The control module 108 collects the electrical signals in the circuit to calculate the resistance value of the first heating element 101, and then calculates the temperature of the first heating element 101. When the second heating element 102 is in temperature measurement mode, the control module 108 controls the second power control module 106 and the first temperature measurement control module 109 to conduct, forming a circuit. The control module 108 collects the electrical signals in the circuit to calculate the resistance value of the second heating element 102, and then calculates the temperature of the second heating element 102. When the third heating element 103 is in temperature measurement mode, the control module 108 controls the second power control module 106 and the second temperature measurement control module 110 to conduct. The second power control module 106, the second heating element 102, and the second temperature measurement control module 110 form a loop. The control module 108 collects the electrical signals in the loop and then calculates the resistance value of the third heating element 103, and then calculates the temperature of the third heating element 103.

[0053] like Figure 4 As shown, when the first heating element 101 is in temperature measurement mode, the control module 108 controls the first power control module 104 and the first temperature measurement control module 109 to conduct, forming a circuit with the first temperature measurement control module 109, the first heating element 101, and the first power control module 104. The control module 108 collects the electrical signals in the circuit to calculate the resistance value of the first heating element 101, and then calculates the temperature of the first heating element 101. When the second heating element 102 is in temperature measurement mode, the control module 108 controls the second power control module 106 and the first temperature measurement control module 109 to conduct, forming a circuit with the first temperature measurement control module 109, the second heating element 102, and the second power control module 106. The control module 108 collects the electrical signals in the circuit to calculate the resistance value of the second heating element 102, and then calculates the temperature of the second heating element 102. When the third heating element 103 is in temperature measurement mode, the control module 108 controls the second power control module 106 and the second temperature measurement control module 110 to conduct. The second temperature measurement control module 110, the second heating element 102, and the second power control module 106 form a loop. The control module 108 collects the electrical signals in the loop and then calculates the resistance value of the third heating element 103, and then calculates the temperature of the third heating element 103.

[0054] The technical advantages of this implementation are as follows: Precise temperature monitoring of the two heating elements is achieved through the first and second temperature control modules; utilizing the voltage divider principle, the resistance changes of the first and second heating elements can be accurately collected and converted into voltage signals fed back to the control module. This allows for real-time monitoring of the heating element temperature changes.

[0055] As one implementation of the first power control module 104, such as Figure 5 and Figure 6 As shown, the first power control module 104 includes a first NMOS transistor Q1 and a first resistor R1. The drain of the first NMOS transistor Q1 is the first terminal of the first power control module 104. The first terminal of the first resistor R1 and the source of the first NMOS transistor Q1 are connected together to form the second terminal of the first power control module 104. The second terminal of the first resistor R1 and the gate of the first NMOS transistor Q1 are connected together to form the control terminal of the first power control module 104.

[0056] In this circuit, the first NMOS transistor Q1 acts as a power switch. It controls the current based on the received PWM control signal. When an appropriate control voltage is applied to the gate (control terminal), Q1 turns on, allowing current to flow from the source to the drain or vice versa, thus powering the heating element A. If the gate voltage falls below a certain threshold, Q1 turns off, blocking current flow and stopping power supply to the heating element. The first resistor R1 primarily regulates the voltage between the gate and source, controlling the on / off state of Q1. It limits both current and voltage in the circuit, ensuring the gate-source voltage remains within a reasonable range, thereby precisely controlling the switching state of Q1.

[0057] The technical effect of this embodiment is that the overall function of the first power control module 104 is to control the current flowing through the heating element A, and to adjust the heating degree of the heating element by controlling the switching state of the first NMOS transistor Q1. The voltage at the control terminal determines the gate voltage, thereby affecting the conduction and turn-off of the first NMOS transistor Q1.

[0058] As one implementation of the second power control module 106, such as Figure 5 and Figure 6 As shown, the second power control module 106 includes a second NMOS transistor Q2 and a second resistor R2. The drain of the second NMOS transistor Q2 is the first terminal of the second power control module 106. The first terminal of the second resistor R2 and the source of the second NMOS transistor Q2 are connected together to form the second terminal of the second power control module 106. The second terminal of the second resistor R2 and the gate of the second NMOS transistor Q2 are connected together to form the control terminal of the second power control module 106.

[0059] In this circuit, the second NMOS transistor Q2 acts as a power switch. It controls the current based on the received PWM control signal. When an appropriate control voltage is applied to the gate (control terminal), Q2 turns on, allowing current to flow from the source to the drain or vice versa, thus powering the heating elements B and C. If the gate voltage falls below a certain threshold, Q2 turns off, blocking current flow and stopping power supply to the heating elements. The second resistor R2 is primarily used to adjust the gate voltage, controlling the on / off state of Q2. It limits both current and voltage in the circuit, ensuring the gate voltage remains within a reasonable range, thereby precisely controlling the switching state of Q2.

[0060] The technical effect of this embodiment is that the overall function of the second power control module 106 is to control the current flowing through the second heating element 102 and the third heating element 103, and to adjust the heating degree of the heating element by controlling the switching state of the second NMOS transistor Q2. The voltage at the control terminal determines the gate voltage, thereby affecting the conduction and turn-off of the second NMOS transistor Q2.

[0061] As one implementation method, such as Figure 5 and Figure 6 As shown, the first temperature measurement and control module 109 includes a first PMOS transistor Q3, a third resistor R3, and a fourth resistor R4. The first end of the fourth resistor R4 is the first end of the first temperature measurement and control module 109, the second end of the fourth resistor R4 is connected to the drain of the first PMOS transistor Q3, the source of the first PMOS transistor Q3 and the first end of the third resistor R3 are connected together to form the second end of the first temperature measurement and control module 109, and the gate of the first PMOS transistor Q3 and the second end of the third resistor R3 are connected together to form the control end of the first temperature measurement and control module 109.

[0062] The first temperature control module 109 primarily controls the current flow through the coordinated operation of a first PMOS transistor Q3, a third resistor R3, and a fourth resistor R4, thereby measuring the temperature of the heating element. Temperature detection can be achieved through a voltage divider principle. The drain of the first PMOS transistor Q3 is connected to the fourth resistor R4, receiving current signals from or outputting current to the fourth resistor R4. The source of the first PMOS transistor Q3 is connected to ground or the power supply voltage through the third resistor R3, receiving the power supply voltage or outputting voltage to ground. The gate of the first PMOS transistor Q3 is connected to the second terminal of the third resistor R3. The gate voltage determines whether the first PMOS transistor Q3 is turned on. The gate voltage is controlled by the control terminal. When the voltage between the gate and source reaches a threshold, the first PMOS transistor Q3 turns on, and current begins to flow, thus heating the heating element. The fourth resistor R4 forms a voltage divider circuit with the heating element. Changes in the temperature of the heating element cause changes in resistance, thus affecting the voltage across the fourth resistor R4. By measuring this voltage divider signal, the temperature of the heating element can be reflected.

[0063] The technical advantages of this embodiment are as follows: by setting the first PMOS transistor Q3, the third resistor R3 and the fourth resistor R4, the temperature of the heating element can be accurately measured. Through the voltage divider principle, the fourth resistor R4 and the heating element together form a voltage divider circuit. The change in temperature causes the change in resistance, thereby affecting the voltage passing through the fourth resistor R4. The collected electrical signal can reflect the temperature change of the heating element in real time and accurately monitor the working status of the heating element. It has the advantages of simple structure, fast response and high stability.

[0064] As one implementation method, such as Figure 5 and Figure 6 As shown, the first heating control module 105 includes a second PMOS transistor Q4 and a fifth resistor R5. The drain of the second PMOS transistor Q4 is the first terminal of the first heating control module 105. The source of the second PMOS transistor Q4 and the first terminal of the fifth resistor R5 are connected together to form the second terminal of the first heating control module 105. The gate of the second PMOS transistor Q4 and the second terminal of the fifth resistor R5 are connected together to form the control terminal of the first heating control module 105.

[0065] In this design, the drain of the second PMOS transistor Q4 serves as either the output or input terminal of the first heating control module 105. This port is connected to the heating element and is used to activate the heating function by controlling the current flow. Specifically, when the second PMOS transistor Q4 is turned on, current flows from the drain to the source or vice versa, passing through the heating element, thereby initiating the heating process. The gate of the second PMOS transistor Q4 is connected to the second terminal of the fifth resistor R5, and the on / off state of the second PMOS transistor Q4 is controlled by the gate voltage. When the voltage between the gate and source reaches an appropriate value, the second PMOS transistor Q4 is turned on, allowing current to flow to heat the heating element.

[0066] The technical advantage of this embodiment is that the heating function is achieved through the control of the second PMOS transistor Q4. When the second PMOS transistor Q4 is turned on, current flows through the heating element, initiating the heating process and raising the temperature. The gate voltage of the second PMOS transistor Q4 is adjusted by the fifth resistor R5. By controlling the voltage between the gate and the source, the on and off states of the second PMOS transistor Q4 are precisely controlled.

[0067] As one implementation method, such as Figure 5 and Figure 6 As shown, the second temperature control module 110 includes a third PMOS transistor Q5, a sixth resistor R6, and a seventh resistor R7. The first end of the seventh resistor R7 is the first end of the second temperature control module 110, and the second end of the seventh resistor R7 is connected to the drain of the third PMOS transistor Q5. The source of the third PMOS transistor Q5 and the first end of the sixth resistor R6 are connected together to the second end of the first temperature control module 109. The gate of the third PMOS transistor Q5 and the second end of the sixth resistor R6 are connected together to the control end of the second temperature control module 110.

[0068] The first temperature control module 109 primarily controls the current flow through the coordinated operation of the third PMOS transistor Q5, the sixth resistor R6, and the seventh resistor R7, thereby measuring the temperature of the heating element. Temperature detection is achieved through a voltage divider principle. The drain of the third PMOS transistor Q5 is connected to the seventh resistor R7, receiving the current signal from it. The source of the third PMOS transistor Q5 is connected to ground or the power supply voltage through the sixth resistor R6, receiving the power supply voltage or outputting the voltage to ground. The gate of the third PMOS transistor Q5 is connected to the second terminal of the sixth resistor R6. The gate voltage determines whether the third PMOS transistor Q5 is turned on. The gate voltage is controlled by the control terminal. When the voltage between the gate and source reaches a threshold, the third PMOS transistor Q5 turns on, and current begins to flow, thus responding to the temperature signal. The seventh resistor R7 forms a voltage divider circuit with the heating element. Changes in the temperature of the heating element cause changes in resistance, affecting the voltage across the seventh resistor R7, and consequently affecting the operating state of the third PMOS transistor Q5. By measuring this voltage divider signal, the temperature of the heating element can be reflected. The function of the sixth resistor R6 is to regulate the current and provide feedback voltage. It mainly regulates the gate voltage by changing the current, thereby controlling the operating state of the third PMOS transistor Q5.

[0069] The technical advantages of this embodiment are as follows: by setting the third PMOS transistor Q5, the sixth resistor R6 and the seventh resistor R7, the temperature of the heating element can be accurately measured. Through the voltage divider principle, the seventh resistor R7 and the heating element together form a voltage divider circuit. The change in temperature causes the change in resistance, thereby affecting the voltage passing through the seventh resistor R7. It can reflect the temperature change of the heating element in real time and accurately monitor the working status of the heating element. It has the advantages of simple structure, fast response and high stability.

[0070] As one implementation method, such as Figure 5 and Figure 6 As shown, the second heating control module 107 includes a fourth PMOS transistor Q6 and an eighth resistor R8. The drain of the fourth PMOS transistor Q6 is the first terminal of the second heating control module 107. The source of the fourth PMOS transistor Q6 and the first terminal of the eighth resistor R8 are connected together to form the second terminal of the second heating control module 107. The gate of the fourth PMOS transistor Q6 and the second terminal of the eighth resistor R8 are connected together to form the control terminal of the second heating control module 107.

[0071] In this design, the drain of the fourth PMOS transistor Q6 serves as either the output or input terminal of the second heating control module 107. This port is connected to the heating element and is used to activate the heating function by controlling the current flow. Specifically, when the fourth PMOS transistor Q6 is turned on, current flows from the drain to the source or vice versa, passing through the heating element, thereby initiating the heating process. The gate of the fourth PMOS transistor Q6 is connected to the second terminal of the eighth resistor R8, and the on / off state of the fourth PMOS transistor Q6 is controlled by the gate voltage. When the voltage between the gate and source reaches an appropriate value, the fourth PMOS transistor Q6 is turned on, allowing current to flow to heat the heating element.

[0072] The technical advantage of this embodiment is that the heating function is achieved through the control of the fourth PMOS transistor Q6. When the fourth PMOS transistor Q6 is turned on, current flows through the heating element, initiating the heating process and raising the temperature. The gate voltage of the fourth PMOS transistor Q6 is adjusted by the eighth resistor R8. By controlling the voltage between the gate and the source, the on and off states of the fourth PMOS transistor Q6 are precisely controlled.

[0073] The following is combined Figure 5 The circuit diagram shown illustrates each operating mode in detail, and the signal relationships for each operating mode are listed in the table below:

[0074] Work status Work mode PWM1 CHK1 EN1 PWM2 CHK2 EN2 1 Section A heating high level high level low level low level high level high level 2 Temperature measurement in section A high level low level high level low level high level high level 3 Section B heating low level high level low level high level high level high level 4 Temperature measurement in section B low level low level high level high level high level high level 5 Section C heating low level high level high level high level high level low level 6 Temperature measurement in section C low level high level high level high level low level high level

[0075] like Figure 7As shown, the first working mode is heating of section A heating element. The signals PWM1, CHK1, CHK2 and EN2 output by the control module 108 are high-level signals, and signals EN1 and PWM2 are low-level signals. The first NMOS transistor Q1 and the second PMOS transistor Q4 are turned on, and the second NMOS transistor Q2, the first PMOS transistor Q3, the third PMOS transistor Q5 and the fourth PMOS transistor Q6 are turned off. The second PMOS transistor Q4, the section A heating element and the first NMOS transistor Q1 form a heating circuit. The power supply voltage VCC heats the section A heating element through the heating circuit.

[0076] like Figure 8 As shown, the second working mode is temperature measurement of the heating element in section A. The signals PWM1, EN1, CHK2 and EN2 output by the control module 108 are high-level signals, and signals CHK1 and PWM2 are low-level signals. The first NMOS transistor Q1 and the first PMOS transistor Q3 are turned on, and the second NMOS transistor Q2, the second PMOS transistor Q4, the third PMOS transistor Q5 and the fourth PMOS transistor Q6 are turned off. The first PMOS transistor Q3, resistor R4, the heating element in section A and the first NMOS transistor Q1 form a temperature measurement circuit. The power supply voltage VCC heats the heating element in section A through the temperature measurement circuit. The control module 108 acquires the current acquisition signal AD1, calculates the resistance of the heating element in section A by combining the power supply voltage VCC and the resistance value of resistor R4, and then obtains the temperature of the heating element in section A according to the relationship between the resistance value and the temperature.

[0077] like Figure 9 As shown, the third working mode is heating of the B-segment heating element. The signals CHK1, PWM2, CHK2 and EN2 output by the control module 108 are high-level signals, and signals PWM1 and EN1 are low-level signals. The second NMOS transistor Q2 and the second PMOS transistor Q4 are turned on, and the first NMOS transistor Q1, the first PMOS transistor Q3, the third PMOS transistor Q5 and the fourth PMOS transistor Q6 are turned off. The second PMOS transistor Q4, the B-segment heating element and the second NMOS transistor Q2 form a heating circuit. The power supply voltage VCC heats the B-segment heating element through the heating circuit.

[0078] like Figure 10As shown, the fourth working mode is temperature measurement of the B-segment heating element. The signals EN1, PWM2, CHK2, and EN2 output by the control module 108 are high-level signals, while signals PWM1 and CHK1 are low-level signals. The second NMOS transistor Q2 and the first PMOS transistor Q3 are turned on, while the first NMOS transistor Q1, the second PMOS transistor Q4, the third PMOS transistor Q5, and the fourth PMOS transistor Q6 are turned off. The first PMOS transistor Q3, resistor R4, the B-segment heating element, and the second NMOS transistor Q2 form a temperature measurement circuit. The power supply voltage VCC heats the B-segment heating element through the temperature measurement circuit. The control module 108 acquires the current acquisition signal AD1, calculates the resistance value of the B-segment heating element by combining the power supply voltage VCC and the resistance value of resistor R4, and then obtains the temperature of the B-segment heating element based on the relationship between the resistance value and the temperature.

[0079] like Figure 11 As shown, the third working mode is C-segment heating. The signals CHK1, EN1, PWM2 and CHK2 output by the control module 108 are high-level signals, while PWM1 and EN2 are low-level signals. The second NMOS transistor Q2 and the fourth PMOS transistor Q6 are turned on, while the first NMOS transistor Q1, the first PMOS transistor Q3, the third PMOS transistor Q5 and the second PMOS transistor Q4 are turned off. The fourth PMOS transistor Q6, the C-segment heating element and the second NMOS transistor Q2 form a heating circuit. The power supply voltage VCC heats the C-segment heating element through the heating circuit.

[0080] like Figure 12 As shown, the fourth working mode is temperature measurement of the C-segment heating element. The signals CHK1, EN1, PWM2, and EN2 output by the control module 108 are high-level signals, while PWM1 and CHK2 are low-level signals. The second NMOS transistor Q2 and the third PMOS transistor Q5 are turned on, while the first NMOS transistor Q1, the first PMOS transistor Q3, the second PMOS transistor Q4, and the fourth PMOS transistor Q6 are turned off. The third PMOS transistor Q5, resistor R7, the C-segment heating element, and the second NMOS transistor Q2 form a temperature measurement circuit. The power supply voltage VCC heats the C-segment heating element through the temperature measurement circuit. The control module 108 acquires the current acquisition signal AD2, calculates the resistance of the C-segment heating element by combining the power supply voltage VCC and the resistance value of resistor R7, and then obtains the temperature of the C-segment heating element based on the relationship between the resistance value and the temperature.

[0081] The following is combined Figure 6 The circuit diagram shown illustrates each operating mode in detail, and the signal relationships for each operating mode are listed in the table below:

[0082] Work status Work mode PWM1 CHK1 EN1 PWM2 CHK2 EN2 1 Section A heating low level high level low level high level high level high level 2 Temperature measurement in section A low level low level high level high level high level high level 3 Section B heating high level high level low level low level high level high level 4 Temperature measurement in section B high level low level high level low level high level high level 5 Section C heating high level high level high level low level high level low level 6 Temperature measurement in section C high level high level high level low level low level high level

[0083] like Figure 13 As shown, the first working mode is heating of the A-section heating element. The signals PWM2, CHK1, CHK2 and EN2 output by the control module 108 are high-level signals, and signals EN1 and PWM1 are low-level signals. The first NMOS transistor Q1 and the second PMOS transistor Q4 are turned on, and the second NMOS transistor Q2, the first PMOS transistor Q3, the third PMOS transistor Q5 and the fourth PMOS transistor Q6 are turned off. The first NMOS transistor Q1, the A-section heating element and the second PMOS transistor Q4 form a heating circuit. The power supply voltage VCC heats the A-section heating element through the heating circuit.

[0084] like Figure 14 As shown, the second working mode is temperature measurement of the heating element in section A. The signals PWM2, EN1, CHK2 and EN2 output by the control module 108 are high-level signals, while the signals CHK1 and PWM1 are low-level signals. The first NMOS transistor Q1 and the first PMOS transistor Q3 are turned on, while the second NMOS transistor Q2, the second PMOS transistor Q4, the third PMOS transistor Q5 and the fourth PMOS transistor Q6 are turned off. The first NMOS transistor Q1, the heating element in section A, the resistor R4 and the first PMOS transistor Q3 form a temperature measurement circuit. The power supply voltage VCC heats the heating element in section A through the temperature measurement circuit. The control module 108 acquires the current acquisition signal AD1, calculates the resistance of the heating element in section A by combining the power supply voltage VCC and the resistance value of the resistor R4, and then obtains the temperature of the heating element in section A based on the relationship between the resistance value and the temperature.

[0085] like Figure 15 As shown, the third working mode is heating of the B-segment heating element. The signals CHK1, PWM1, CHK2 and EN2 output by the control module 108 are high-level signals, and the signals PWM2 and EN1 are low-level signals. The second NMOS transistor Q2 and the second PMOS transistor Q4 are turned on, and the first NMOS transistor Q1, the first PMOS transistor Q3, the third PMOS transistor Q5 and the fourth PMOS transistor Q6 are turned off. The second NMOS transistor Q2, the B-segment heating element and the second PMOS transistor Q4 form a heating circuit. The power supply voltage VCC heats the B-segment heating element through the heating circuit.

[0086] like Figure 16As shown, the fourth working mode is temperature measurement of the B-segment heating element. The signals EN1, PWM1, CHK2, and EN2 output by the control module 108 are high-level signals, while PWM2 and CHK1 are low-level signals. The second NMOS transistor Q2 and the first PMOS transistor Q3 are turned on, while the first NMOS transistor Q1, the second PMOS transistor Q4, the third PMOS transistor Q5, and the fourth PMOS transistor Q6 are turned off. The second NMOS transistor Q2, the B-segment heating element, the resistor R4, and the first PMOS transistor Q3 form a temperature measurement circuit. The power supply voltage VCC heats the B-segment heating element through the temperature measurement circuit. The control module 108 acquires the current acquisition signal AD1, calculates the resistance value of the B-segment heating element by combining the power supply voltage VCC and the resistance value of the resistor R4, and then obtains the temperature of the B-segment heating element based on the relationship between the resistance value and the temperature.

[0087] like Figure 17 As shown, the third working mode is C-segment heating. The signals CHK1, EN1, PWM1 and CHK2 output by the control module 108 are high-level signals, and the signals PWM2 and EN2 are low-level signals. The second NMOS transistor Q2 and the fourth PMOS transistor Q6 are turned on, and the first NMOS transistor Q1, the first PMOS transistor Q3, the third PMOS transistor Q5 and the second PMOS transistor Q4 are turned off. The second NMOS transistor Q2, the C-segment heating element and the fourth PMOS transistor Q6 form a heating circuit. The power supply voltage VCC heats the C-segment heating element through the heating circuit.

[0088] like Figure 18 As shown, the fourth working mode is temperature measurement of the C-segment heating element. The signals CHK1, EN1, PWM1, and EN2 output by the control module 108 are high-level signals, while the signals PWM2 and CHK2 are low-level signals. The second NMOS transistor Q2 and the third PMOS transistor Q5 are turned on, while the first NMOS transistor Q1, the first PMOS transistor Q3, the second PMOS transistor Q4, and the fourth PMOS transistor Q6 are turned off. The second NMOS transistor Q2, the C-segment heating element, the resistor R7, and the third PMOS transistor Q5 form a temperature measurement circuit. The power supply voltage VCC heats the C-segment heating element through the temperature measurement circuit. The control module 108 acquires the current acquisition signal AD2, calculates the resistance value of the C-segment heating element by combining the power supply voltage VCC and the resistance value of the resistor R7, and then obtains the temperature of the C-segment heating element based on the relationship between the resistance value and the temperature.

[0089] Example 2

[0090] This second embodiment provides an HNB appliance, including a three-segment heating circuit as described in embodiment one.

[0091] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A three-stage heating element heating circuit of an HNB appliance, characterized in that, The three-section heating body includes a first heating body, a second heating body and a third heating body, a first end of the first heating body is connected to a second end of the second heating body, a first end of the second heating body is connected to a second end of the third heating body, and the three-section heating body heating circuit includes a first power control module, a first heating control module, a second power control module, a second heating control module and a control module; a first end of the first power control module is connected to a second end of the first heating body, a first end of the first heating control module is connected to a first end of the first heating body, a first end of the second power control module is connected to a first end of the second heating body, and a first end of the second heating control module is connected to a first end of the third heating body; when one of the power control module and the heating control module connected to the two ends of each heating body is connected to a power supply voltage, the other is grounded. The control module is connected to a control end of the first power control module, a control end of the first heating control module, a control end of the second power control module, a control end of the second heating control module, a first end of the first heating body and a first end of the third heating body, and is used for controlling the power control module and the heating control module at the two ends of at least one heating body to be turned on, so as to heat at least one heating body.

2. The three-stage heating element heating circuit according to claim 1, characterized in that, A second end of the first power control module is grounded, a second end of the first heating control module is connected to a power supply voltage, a second end of the second power control module is grounded, and a second end of the second heating control module is connected to a power supply voltage.

3. The three-stage heating element heating circuit according to claim 1, characterized in that, A second end of the first power control module is connected to a power supply voltage, a second end of the first heating control module is grounded, a second end of the second power control module is connected to a power supply voltage, and a second end of the second heating control module is grounded.

4. The three-stage heating element heating circuit according to claim 2 or 3, characterized in that, The first power control module includes a first NMOS tube and a first resistor, a drain of the first NMOS tube is a first end of the first power control module, a first end of the first resistor and a source of the first NMOS tube are commonly connected to a second end of the first power control module, and a second end of the first resistor and a gate of the first NMOS tube are commonly connected to a control end of the first power control module.

5. The three-stage heating element heating circuit according to claim 2 or 3, wherein The second power control module includes a second NMOS tube and a second resistor, a drain of the second NMOS tube is a first end of the second power control module, a first end of the second resistor and a source of the second NMOS tube are commonly connected to a second end of the second power control module, and a second end of the second resistor and a gate of the second NMOS tube are commonly connected to a control end of the second power control module.

6. The three-stage heating element heating circuit according to claim 2 or 3, wherein The first heating control module includes a second PMOS tube and a fifth resistor, a drain of the second PMOS tube is a first end of the first heating control module, a source of the second PMOS tube and a first end of the fifth resistor are commonly connected to a second end of the first heating control module, and a gate of the second PMOS tube and a second end of the fifth resistor are commonly connected to a control end of the first heating control module.

7. The three-stage heating element heating circuit according to claim 2 or 3, wherein The second heating control module comprises a fourth PMOS tube and an eighth resistor, a drain of the fourth PMOS tube is a first end of the second heating control module, a source of the fourth PMOS tube and a first end of the eighth resistor are commonly connected as a second end of the second heating control module, and a gate of the fourth PMOS tube and a second end of the eighth resistor are commonly connected as a control end of the second heating control module.

8. The three-stage heating element heating circuit according to claim 2 or 3, wherein The three-section heating body heating circuit further comprises a first temperature measurement control module and a second temperature measurement control module, a first end of the first temperature measurement control module is connected to a first end of the first heating control module, a second end of the first temperature measurement control module is connected to a second end of the first heating control module, a control end of the first temperature measurement control module is connected to the control module, a first end of the second temperature measurement control module is connected to a first end of the second heating control module, a second end of the second temperature measurement control module is connected to a second end of the second heating control module, and a control end of the second temperature measurement control module is connected to the control module. The control module is further configured to control the temperature measurement control module and the power control module connected to each heating body to be turned on, so as to measure the temperature of each heating body.

9. The three-stage heating element heating circuit according to claim 8, wherein The first temperature measurement control module comprises a first PMOS tube, a third resistor and a fourth resistor, a first end of the fourth resistor is a first end of the first temperature measurement control module, a second end of the fourth resistor is connected to a drain of the first PMOS tube, a source of the first PMOS tube and a first end of the third resistor are commonly connected as a second end of the first temperature measurement control module, and a gate of the first PMOS tube and a second end of the third resistor are commonly connected as a control end of the first temperature measurement control module. The second temperature measurement control module comprises a third PMOS tube, a sixth resistor and a seventh resistor, a first end of the seventh resistor is a first end of the second temperature measurement control module, a second end of the seventh resistor is connected to a drain of the third PMOS tube, a source of the third PMOS tube and a first end of the sixth resistor are commonly connected as a second end of the first temperature measurement control module, and a gate of the third PMOS tube and a second end of the sixth resistor are commonly connected as a control end of the second temperature measurement control module.

10. An HNB apparatus, characterized by The three-section heating body heating circuit comprises the three-section heating body heating circuit according to any one of claims 1-9. The three-section heating body heating circuit comprises the three-section heating body heating circuit according to any one of claims 1-9.

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